Xorg assert failure: *** glibc detected *** /usr/bin/X: corrupted double-linked list: 0x0a7a42e0 ***

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ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-core 2:1.9.99.901+git20110131.be3be758-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-2.29-generic 2.6.38-rc3
Uname: Linux 2.6.38-2-generic i686
Architecture: i386
AssertionMessage: *** glibc detected *** /usr/bin/X: corrupted double-linked list: 0x0a7a42e0 ***
CompositorRunning: compiz
CrashCounter: 1
DRM.card0.DP.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.DP.2:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1366x768
 edid-base64: AP///////wAiZIMFcGoDAB0TAQOAHxF4Cvdvn1ZXnCYRUFMAAAABAQEBAQEBAQEBAQEBAQEBTB1WulAAJjAwQmgANa4QAAAZAAAA/gAAAAAAAAAAAAAAAAAAAAAA/ABIU0QxNDBQSFcxCiAgAAAAEAAKICAgICAgICAgICAgAAY=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Thu Feb 10 23:21:40 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/Xorg
GraphicsCard:
 Subsystem: ASRock Incorporation Device [1849:1401]
   Subsystem: ASRock Incorporation Device [1849:1401]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110202)
MachineType: ASRock Silver Series
ProcCmdline: /usr/bin/X :0 -nr -verbose -auth /var/run/gdm/auth-for-gdm-dl0qCT/database -nolisten tcp vt7
ProcEnviron:
 LANG=fr_FR.UTF-8
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-2-generic root=UUID=d2c3f3ce-2d2e-4228-970f-227e76ec4971 ro pci=nomsi pci=noacpi quiet splash vt.handoff=7
ProcKernelCmdLine_: BOOT_IMAGE=/boot/vmlinuz-2.6.38-2-generic root=UUID=d2c3f3ce-2d2e-4228-970f-227e76ec4971 ro pci=nomsi pci=noacpi quiet splash vt.handoff=7
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/libc.so.6
 abort () from /lib/libc.so.6
 ?? () from /lib/libc.so.6
 ?? () from /lib/libc.so.6
Title: Xorg assert failure: *** glibc detected *** /usr/bin/X: corrupted double-linked list: 0x0a7a42e0 ***
UserGroups:

dmi.bios.date: 03/05/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.04
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: Silver
dmi.board.vendor: ASRock Computer
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASRock Computer
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.04:bd03/05/2010:svnASRock:pnSilverSeries:pvr1.0:rvnASRockComputer:rnSilver:rvr1.0:cvnASRockComputer:ct10:cvr1.0:
dmi.product.name: Silver Series
dmi.product.version: 1.0
dmi.sys.vendor: ASRock
version.compiz: compiz 1:0.9.2.1+glibmainloop4-0ubuntu10
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10-1ubuntu1
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.13.2+git20110124.fadee040-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu6
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu4

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #716251, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.